#include <stdio.h>

/*
num_1 += 10;  等效于 num_1 = num_1 + 10;
+=
-=
*=
/=
%=

*/

int main(int argc, char const *argv[])
{
    int num = 10;
    printf("num = %d\n" , num+=50);
    return 0;
}


